NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 19
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2020-09-02 385-359 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-09-02 385-376 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PLEASATGRV UT
2020-09-02 425-510 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2020-09-02 469-884 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F DE SOTO TX
2020-09-02 480-672 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J PHOENIX AZ
2020-09-02 564-201 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OLYMPIA WA
2020-09-02 623-292 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2020-09-02 657-955 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H WESTMINSTR CA
2020-09-02 660-500 0XXX1XXX5XXX · 3 holders which blocks → FRACTEL, LLC 965H ETHEL MO
2020-09-02 660-566 5XXX6XXX · 2 holders which blocks → FRACTEL, LLC 965H CLEARMONT MO
2020-09-02 719-653 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 COLORDOSPG CO
2020-09-02 719-664 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PUEBLO CO
2020-09-02 754-345 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H DEERFLDBCH FL
2020-09-02 779-290 0XXX1XXX2XXX3XXX4XXX6XXX8XXX · 5 holders which blocks → STRATUS NETWORKS 495J MILFORD IL
2020-09-02 785-471 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TOPEKA KS
2020-09-02 816-544 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H OSBORN MO
2020-09-02 816-577 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H CAMERON MO
2020-09-02 863-377 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H WINTER HVN FL
2020-09-02 956-576 0–9 XXXwhole prefix which blocks → STPCS JOINT VENTURE, LLC 4290 BROWNSVL TX
2020-09-01 209-705 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MANTECA CA
2020-09-01 209-716 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ANGELSCAMP CA
2020-09-01 223-239 0–9 XXXall 10 · 4 holders which blocks → FINGER LAKES TECHNOLOGIES GROUP, INC. - PA 464H HARISBGZN1 PA
2020-09-01 234-280 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 478J AKRON OH
2020-09-01 240-726 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J WSHNGTNZN4 MD
2020-09-01 240-735 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 478J BRUNSWICK MD
2020-09-01 302-551 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 478J WILMINGTON DE
2020-09-01 337-545 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C CENTERVL LA
2020-09-01 343-655 not yet reported which blocks → Iristel Inc. 154E Ottawa-Hull —
2020-09-01 365-977 not yet reported which blocks → Iristel Inc. 154E Oakville —
2020-09-01 365-990 not yet reported which blocks → Iristel Inc. 154E Markham —
2020-09-01 385-358 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 KAYSVILLE UT
2020-09-01 412-746 0–9 XXXall 10 · 4 holders which blocks → FINGER LAKES TECHNOLOGIES GROUP, INC. - PA 464H PTTSBGZON1 PA
2020-09-01 431-600 not yet reported which blocks → Iristel Inc. 154E Oakbank —
2020-09-01 445-201 0–9 XXXall 10 · 4 holders which blocks → FINGER LAKES TECHNOLOGIES GROUP, INC. - PA 464H PHLDLPHZN1 PA
2020-09-01 470-641 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2020-09-01 470-643 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA NE GA
2020-09-01 470-652 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2020-09-01 470-659 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2020-09-01 470-662 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2020-09-01 470-667 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2020-09-01 520-476 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 478J TUCSON AZ
2020-09-01 567-326 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J TOLEDO OH
2020-09-01 579-550 not yet reported which blocks → Iristel Inc. 154E Longueuil —
2020-09-01 607-362 0XXX1XXX2XXX3XXX4XXX7XXX9XXX · 6 holders which blocks → NUSO, LLC 478J WORCESTER NY
2020-09-01 612-662 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MN 184D TWINCITIES MN
2020-09-01 636-348 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H ST PETERS MO
2020-09-01 657-453 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2020-09-01 660-400 0XXX4XXX · 2 holders which blocks → FRACTEL, LLC 965H HALE MO
2020-09-01 660-633 3XXX6XXX · 2 holders which blocks → FRACTEL, LLC 965H BRIMSON MO
2020-09-01 660-855 0XXX1XXX2XXX5XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H BLOMINGTON MO

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.